Author Information

VA Medical Center and University of Pennsylvania, Philadelphia

†

Dr. Schumacher has received fees for his role as Section Editor for UpToDate.

‡

Dr. Merkel has received fees (less than $10,000 each) for his role as a contributing author for the American College of Rheumatology, UpToDate, the Vasculitis Clinical Research Consortium, and the Vasculitis Foundation.